remove assert(a,z)/2 (#1975)

src/lib/builtins.pl

@@ -1173,8 +1173,13 @@ clause(H, B) :-
 % The clause will be inserted at the beginning of the module.
 asserta(Clause0) :-
     loader:strip_subst_module(Clause0, user, Module, Clause),
-    iso_ext:asserta(Module, Clause).
+    asserta_(Module, Clause).
 
+asserta_(Module, (Head :- Body)) :-
+    !,
+    '$asserta'(Module, Head, Body).
+asserta_(Module, Fact) :-
+    '$asserta'(Module, Fact, true).
 
 :- meta_predicate assertz(:).
 
@@ -1184,7 +1189,13 @@ asserta(Clause0) :-
 % The clase will be inserted at the end of the module.
 assertz(Clause0) :-
     loader:strip_subst_module(Clause0, user, Module, Clause),
-    iso_ext:assertz(Module, Clause).
+    assertz_(Module, Clause).
+
+assertz_(Module, (Head :- Body)) :-
+    !,
+    '$assertz'(Module, Head, Body).
+assertz_(Module, Fact) :-
+    '$assertz'(Module, Fact, true).
 
 
 :- meta_predicate retract(:).

src/lib/iso_ext.pl

@@ -17,9 +17,7 @@ but they're not part of the ISO Prolog standard at the moment.
                     succ/2,
                     call_nth/2,
                     countall/2,
-                    copy_term_nat/2,
+                    copy_term_nat/2]).
-                    asserta/2,
-                    assertz/2]).
 
 :- use_module(library(error), [can_be/2,
                                domain_error/3,
@@ -384,21 +382,3 @@ countall(Goal, N) :-
 copy_term_nat(Source, Dest) :-
     '$copy_term_without_attr_vars'(Source, Dest).
 
-%% asserta(Module, Rule_Fact).
-%
-% Similar to `asserta/1` but allows specifying a Module
-asserta(Module, (Head :- Body)) :-
-    !,
-    '$asserta'(Module, Head, Body).
-asserta(Module, Fact) :-
-    '$asserta'(Module, Fact, true).
-
-%% assertz(Module, Rule_Fact).
-%
-% Similar to `assertz/1` but allows specifying a Module
-assertz(Module, (Head :- Body)) :-
-    !,
-    '$assertz'(Module, Head, Body).
-assertz(Module, Fact) :-
-    '$assertz'(Module, Fact, true).
-